accidens

plural accidentia

1. human sciencesSynonym of accident (“a property, fact, or relation that is the result of chance or is nonessential or nonsubstantive”).

   But, where there is no apparent reason why the attribute should always be found in the individuals of a class, it is called an Accidens.

   1896, James Welton, A Manual of Logic, volume 1, page 86

   1 more example

   An Accidens (or accident) of an individual, genus, or species is any attribute which is possessed by it, and which does not follow from, or form a part of, its comprehension. […] If, on the other hand, an accidens is sometimes present and sometimes absent in an individual, […]

   1886, Prasanna K. Roy, A Text-book of Deductive Logic: For the Use of Students, page 83

   Synonyms: accident